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1.
Braz J Biol ; 83: e274499, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38055576

RESUMO

Salinity is harmful to crops when the concentration of soluble salts overcomes the salinity threshold of the crop, causing osmotic stress and limitations in plant growth. In this scenario, adopting tolerant cultivars is the most adequate strategy to minimize agricultural losses. However, the inheritance of tolerance depends on the genotype. From this perspective, this study assessed the tolerance to severe salt stress in 11 cotton cultivars based on gas exchange parameters and the free proline content. The cultivars were grown in a greenhouse and subjected to 34 days of saline irrigation (10 dS m-1), starting 45 days after seedling emergence (B1 phase). Plant growth was monitored weekly until the end of the salt stress period. The treatments consisted of a combination of two factors: eleven cultivars associated with two electrical conductivity levels of irrigation water (ECw: 0.3 and 10.0 dS m-1). The experimental design was in randomized blocks in a 11 × 2 factorial arrangement with three replications (66 plots), with the experimental unit consisting of one plant per plot. Salinity impacted plant growth, being reflected on the gas exchange and free proline data of most cultivars. However, BRS 286, FMT 705, BRS 416, and BRS Acácia, and CNPA 7MH withstood the effects of stress and osmotically adjusted to the salt stress conditions, thus minimizing the damage to growth. Those cultivars are the most indicated for improvement programs aiming at tolerance to salt stress based on the results found in this research.


Assuntos
Estresse Salino , Tolerância ao Sal , Plântula , Salinidade , Prolina
2.
Genet Mol Res ; 12(1): 37-43, 2013 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-23359022

RESUMO

A subtractive cDNA library from cotton buds was constructed to prospect for differentially expressed genes related to early bud development. A library was constructed and 768 cDNA sequences were obtained, comprising 168 clusters, with 126 contigs and 42 singlets. Both the Gossypium as well as Arabidopsis databases were utilized for the in silico analysis, since some genes identified in cotton have not yet been studied for functionality, although they have homology with genes from other species. The transcriptome revealed a large number of transcripts, some of them with unknown function, and others related to pollen development, pollen tubes, ovules, and fibers at different stages. The most populated contig was identified as fiber from 0-10 days after anthesis, with 12 reads. The success and novelty rates generated from the library were 67 and 51%, respectively. The information obtained here will provide a framework for research on functional cotton genomics.


Assuntos
Regulação da Expressão Gênica de Plantas , Genes de Plantas , Gossypium/crescimento & desenvolvimento , Gossypium/genética , Fibra de Algodão , DNA Complementar/genética , Biblioteca Gênica , Transcriptoma/genética
3.
São Paulo; Secretaria da Saúde. Coordenação de Vigilância em Saúde. Gerência do Centro de Controle e Prevenção de Doenças; 2011. 1 p. ilus, graf.
Não convencional em Português | Coleciona SUS, COVISA-Producao, Sec. Munic. Saúde SP, Sec. Munic. Saúde SP | ID: biblio-937373
4.
São Paulo; Secretaria da Saúde. Coordenação de Vigilância em Saúde. Gerência do Centro de Controle e Prevenção de Doenças; 2011. 1 p. ilus, graf, tab.
Não convencional em Português | Coleciona SUS, COVISA-Producao, Sec. Munic. Saúde SP, Sec. Munic. Saúde SP | ID: biblio-937378
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